package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // 对前端传入的密码进行加密处理比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     *
     * @param employeeDTO
     * @return
     */

    public void save(EmployeeDTO employeeDTO) {
        // 创建员工数据模型实例
        Employee employee = new Employee();
        // 拷贝传入的员工信息
        BeanUtils.copyProperties(employeeDTO,employee);
        // 设置员工信息剩余属性
        employee.setStatus(StatusConstant.ENABLE); // StatusConstant类似于枚举的一个常量类
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes())); // 设置默认密码
        employee.setCreateTime(LocalDateTime.now()); // 创建时间
        employee.setUpdateTime(LocalDateTime.now()); // 修改时间
        // TODO 后期需要动态设置为当前登录用户的信息
        employee.setCreateUser(BaseContext.getCurrentId()); // 创建人ID
        employee.setUpdateUser(BaseContext.getCurrentId()); // 更新人ID

        // 插入数据
        employeeMapper.insert(employee);

    }

    /**
     * 分页查询员工
     *
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {

        // 使用pagehelper实现分页查询
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);
        Long total = page.getTotal(); // 获取员工总数
        List<Employee> records = page.getResult(); // 获取员工列表

        return new PageResult(total,records);
    }
    /**
     * 切换员工状态
     *
     * @param status
     * @param id
     * @return
     */
    @Override
    public void changeStatus(Integer status, Long id) {
        // 根据id查询员工并修改status
        Employee employee = Employee.builder().status(status).id(id).build();
        employeeMapper.update(employee);
    }

    @Override
    public Employee getDetail(Long id) {
       Employee employee =  employeeMapper.getDetail(id);
       employee.setPassword("********");
       return employee;
    }

    /**
     * 修改员工信息
     * @param employeeDTO
     * @return
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
        employee.setUpdateTime(LocalDateTime.now()); // 修改时间
        employee.setUpdateUser(BaseContext.getCurrentId()); // 更新人ID
        employeeMapper.update(employee);
//        System.out.println(employee);
    }

    /**
     * 删除员工
     * @param id
     * @return
     */
    @Override
    public void delete(Long id) {
        employeeMapper.delete(id);
    }


}
